In the past we've always spec'd a high-end air cooler for our Performance build, however we've seen a few really good yet inexpensive liquid cooling kits come out recently. Among these was the Swiftech H20-220 Compact that we reviewed several months ago. Coming from a brand like Swiftech you know it's going to be high quality and the performance is really good, even for a pre-assembled kit. If you don't have room for a double-sized radiator in your case, the Swiftech Compact series is also available in a single H20-120 model.